https://github.com/python/cpython/commit/a175d64e30b0ff9f011aea2da6d6e21ccfdcd893
commit: a175d64e30b0ff9f011aea2da6d6e21ccfdcd893
branch: main
author: Chris Eibl <138194463+chris-e...@users.noreply.github.com>
committer: picnixz <10796600+picn...@users.noreply.github.com>
date: 2025-03-30T10:12:42+02:00
summary:
GH-129149: Add fast path for medium-sized integers in `PyLong_From*` functions
(#131211)
Add a fast path for medium-sized integers in `PyLong_FromInt{32,64}` and
`PyLong_FromUInt{32,64}`.
files:
A
Misc/NEWS.d/next/Core_and_Builtins/2025-03-13-20-23-02.gh-issue-129149.z42wkm.rst
M Objects/longobject.c
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-03-13-20-23-02.gh-issue-129149.z42wkm.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-03-13-20-23-02.gh-issue-129149.z42wkm.rst
new file mode 100644
index 00000000000000..9da77312cbb22d
--- /dev/null
+++
b/Misc/NEWS.d/next/Core_and_Builtins/2025-03-13-20-23-02.gh-issue-129149.z42wkm.rst
@@ -0,0 +1,4 @@
+Add fast path for small and medium-size integers in
+:c:func:`PyLong_FromInt32`, :c:func:`PyLong_FromUInt32`,
+:c:func:`PyLong_FromInt64` and
+:c:func:`PyLong_FromUInt64`. Patch by Chris Eibl.
diff --git a/Objects/longobject.c b/Objects/longobject.c
index 984381ff4969d0..d0c3bb145ac28d 100644
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -6749,16 +6749,24 @@ PyUnstable_Long_CompactValue(const PyLongObject* op) {
PyObject* PyLong_FromInt32(int32_t value)
-{ return PyLong_FromNativeBytes(&value, sizeof(value), -1); }
+{
+ PYLONG_FROM_INT(uint32_t, int32_t, value);
+}
PyObject* PyLong_FromUInt32(uint32_t value)
-{ return PyLong_FromUnsignedNativeBytes(&value, sizeof(value), -1); }
+{
+ PYLONG_FROM_UINT(uint32_t, value);
+}
PyObject* PyLong_FromInt64(int64_t value)
-{ return PyLong_FromNativeBytes(&value, sizeof(value), -1); }
+{
+ PYLONG_FROM_INT(uint64_t, int64_t, value);
+}
PyObject* PyLong_FromUInt64(uint64_t value)
-{ return PyLong_FromUnsignedNativeBytes(&value, sizeof(value), -1); }
+{
+ PYLONG_FROM_UINT(uint64_t, value);
+}
#define LONG_TO_INT(obj, value, type_name) \
do { \
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